Though nothing sucks worse then a squad of Finnish or Estonian speakers. I don't even understand how that passes for human communication.
Finnish is pronounced as written. Therefore, if you hear a Finnish word spoken but have never seen it written you know how to write it, and vice versa. As a result, any literate Finn would get 100% in a native-language "spelling contest" - that's why we don't have such nonsense unlike those stupid Americans.
Naturally, this produces an accent of its own - however, native Latin speakers would find it very familiar. In addition, schools here try to teach British English & Received Pronouciation instead of American English which is more prevalent in the media, so the end result tends to be something inbetween, but with Finnish accent.
However, what makes situation worse is that Finnish does not have intonation as such: intonation in the Finnish language is normally associated with stage acting, or flat-out comedy, it does not exist in normal speech
at all. Thus, including that as part of a foreign language is usually last on any Finn's list after vocabulary and grammar since it is not natural, it is something that requires conscious effort and quite a lot of pretending. So "naturally occurring" Finglish tends to sound quite monotonous.
Although an ex-coworker once told me that I sound like Borat (it's the pot calling the kettle black: she was Belgian French and her English was barely understood by anyone, even the Belgians), and in a recent FHGN I was told that I sound like a robot
I still keep using the mic in FHGN's. Maybe I'll some night scare you all by joining in a VOIP ONLY squad